Messages in this thread Patch in this message | | | From | Qais Yousef <> | Subject | [PATCH v4 04/17] arm: Don't use disable_nonboot_cpus() | Date | Mon, 23 Mar 2020 13:50:57 +0000 |
| |
disable_nonboot_cpus() is not safe to use when doing machine_down(), because it relies on freeze_secondary_cpus() which in turn is a suspend/resume related freeze and could abort if the logic detects any pending activities that can prevent finishing the offlining process.
Beside disable_nonboot_cpus() is dependent on CONFIG_PM_SLEEP_SMP which is an othogonal config to rely on to ensure this function works correctly.
Signed-off-by: Qais Yousef <qais.yousef@arm.com> CC: Russell King <linux@armlinux.org.uk> CC: linux-arm-kernel@lists.infradead.org CC: linux-kernel@vger.kernel.org --- arch/arm/kernel/reboot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c index bb18ed0539f4..58ad1a70f770 100644 --- a/arch/arm/kernel/reboot.c +++ b/arch/arm/kernel/reboot.c @@ -88,11 +88,11 @@ void soft_restart(unsigned long addr) * to execute e.g. a RAM-based pin loop is not sufficient. This allows the * kexec'd kernel to use any and all RAM as it sees fit, without having to * avoid any code or data used by any SW CPU pin loop. The CPU hotplug - * functionality embodied in disable_nonboot_cpus() to achieve this. + * functionality embodied in smp_shutdown_nonboot_cpus() to achieve this. */ void machine_shutdown(void) { - disable_nonboot_cpus(); + smp_shutdown_nonboot_cpus(0); } /* -- 2.17.1
| |